A distant star is receding from the Earth with a speed of $1.40 \times {10^7}m{s^{ - 1}}$. It emits light of frequency $4.57 \times {10^{14}}Hz$. The speed of light is $3.00 \times {10^8}m{s^{ - 1}}$.
The Doppler effect formula can be used with light waves.
What will be the frequency of this light when detected on Earth?
1 )
$2.04 \times {10^{13}}Hz$
$4.37 \times {10^{14}}Hz$
3 )
$4.57 \times {10^{14}}Hz$
4 )
$4.79 \times {10^{14}}Hz$
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